"Tell me ISRG's target ACME Client is built into a webserver written in Go, without telling me ISRG's target ACME Client is built into a webserver written in Go."
This is not a comment about your server at all (pure coincidence, I swear) - just that ISRG seems more focused on pushing a particular model/technology stack, and not as focused on widespread adoption or utilization to ensure global web security.